Improvement in watch-stems



A. MILNE au A. JOURDAIN.

Watch-Stem.

No. 206.598.. Patemed'luly soi 1878;..

Vdbzff jnvenZz/*r fMf/Q N. FI'ERS, PHOTO ALEXANDER MILNE AND ARMAND JOURDAN, OF NEll'vAl-l, YEv

JERSEY.

IMPROVEMENT IN WATCH-STEIVIS.

Specification forming part of Letters Patent N0, 206,598, dated July SEO, l-T application tiled June 13, 1878.

To all whomy it may concern:

De it known that we, ALEXANDER MILN and ARMAND JOURDAIN, of Newark, in the county of Essex and State of New J ersey, have invented a new and useful Improvement i n fateli-Stems for Stem-finding \Vatcl1es, of which the following is a specification:

Figure lis a side elevation. Fig. 2 is a seetional elevation.

This invention relates, in stem winding Watches, to the mea-ns employed in attaching and detaching the stem-winding crown to or from the pendant of a Watch-ease7 for the purpose of inserting or removing the movements in or from a case, the object being to increase the facility for attaching or dctaching the crown.

To the crown A is attached the threaded key-pipe D, the end being screwed into the crown 5 but before this connection is made the adjustable nut C is turned on the pipe, and is used to gage the action of the crown on the spring of the Watch-case. The nut serves also as a collar to hold the crown and key-pipe on the collar D. After the nut. is put on the pipe the collar D is also slipped on from the same end, and then the pipe is screwed into the crown, the end of the collar also extending,` into the crown or the pipe may be made fast in the crown, and be screw-threaded from the other end, andthe collar and nut be put on from that end. To the inner end of the collar D, lying in aI groove in the inside ot it, is a spring, F, having the point c bent outward through the side of the collar, and as far beyond the outside of itas is required to pass through the side 0f the pendant- H and appear in the hole Q1 in the same, when the collar on the pipe has been pushed into the end ot' the pendant, the spring and point taking the place ot' a set-screw in attaching the crown to the pendant of thc watch-case.

To Withdraw the crown the point c is depressed, when it is easily detached.

By the automatic action of the sprin the connection is ver Yrapidly made or severed between the crown and the ease, and a large advantage is gained; therefore What ive claim as our invention, and dcsi rc to secure by Letters Patent7 is- 1. In the stcnrwinding crovvn attachment for Watches, the threaded key-pipe D, having the adjustable nut C, in combination with the collar D7 substantially and for the purposes specified.

2. In combination with the watch-case pendant H and the threaded key-pipe D, having the adjustable nut C, the collar D7 provided with the spring F and point c, substantiall)v as and for the purpose set forth.

ALEXANDER MILNE. ARMAND J OURDAIN.

Witnesses:

HORACE Harnais, JOHN H. Ross.

FFICE. 

